The Bears ran their second session of organized team activities Wednesday on a warm, sunny day at Halas Hall. Here’s what we learned as the media watched the veterans and rookies together on the field for the first time.

Amukamara, a seven-year NFL cornerback, said the return of defensive coordinator Vic Fangio and defensive backs coach Ed Donatell were two reasons he decided to sign a three-year free-agent contract with the Bears this offseason.

But he also was struck by the Bears’ potential on the other side of the ball.

Trubisky had his ups and downs in a 12-game rookie showing in which he completed 59.4 percent of his passes for 2,193 yards, seven touchdowns and seven interceptions. But Amukamara said Trubisky made a good impression before he was even named the starter.

“I want to win a championship, and having Mitch here, I think that’s always the start,” Amukamara said. “Even when Mitch was the backup, Mitch was staying after practice and always working hard, and you love seeing that in a quarterback, especially a backup. I’ve (seen) greatness in him ever since then. I think this year he gets to really show it.”

Amukamara said he thinks any free agent looking to win would be encouraged by joining a team that believes it has its long-term solution at quarterback in place, and the Bears signed several players to help Trubisky, including wide receivers Allen Robinson and Taylor Gabriel and tight end Trey Burton.

Amukamara said he liked what he saw from coach Matt Nagy’s new offense the last two days.

“They’re moving well,” Amukamara said. “They’re faster. They’re throwing a lot of different looks at us, and that’s just Nagy’s offense. If I was a receiver I would love to play in this offense, just because you get to do so many different things and you get so many different plays. It just looks fun over there.”

Nagy preaches patience as his developing offense faces a more established defense.

Nagy opened his post-practice comments to the media by commending the defense for a good day and noting the offense has a lot of growth ahead of it.

It’s no surprise if the offense is behind the defense at this point.

Fangio returned his defensive coaches and most of his starters. Nagy is only in the beginning stages of installing his offense, and Trubisky and other returnees are trying to mesh with many new coaches and players.

Nagy said the key for his players is to correct their mistakes with post-practice film and move on to the next day.

“It’s actually good for us because we’re getting an experienced defense,” Nagy said. “My message to the team on the offensive side is just be patient and don’t get frustrated. They understand that they’re going to play a little bit faster than us right now. We’ll have some growing pains, but we’ll get back to square one in training camp.”

Several starters still are working their way back from injuries.

Nagy said Robinson is “ahead of the game” in his recovery from 2017 surgery to repair the ACL in his left knee, but the Bears also aren’t hurrying him into practices.

“We’re feeling really good about his prognosis,” Nagy said. “We don't need to rush it. He’s been doing great in meetings. He’s answering every question in meetings. He’s out here, focused, doing everything we want him to do.”

Outside linebacker Leonard Floyd still is working back from right knee surgery, and right guard Kyle Long is recovering from neck, shoulder and elbow surgeries. Nagy said Long “has been doing really well” as he slowly ramps up activity.

“He’s been (focusing) on the details of their job on the offensive line,” Nagy said. “And then as soon as we all agree that he's ready to go (full strength), he'll be up and going.”